Tuck greaser or marker for sewing-machines



(Mm) J. M. GRIEST; i

TU'GK GEBASER'OR MARKER FQ'R SEWING MACHINES.

' N0. 401,029. I Patented Apr. 9, 1889.

N PETERS. Phow thcgmphur, Walllingfml, D C.

, UNITED STATES PATENT OFFICE.

JOHN M. GRIEST, OF BERGEN POINT, NEWV JERSEY, ASSIGNOR TO THE SINGERMANUFACTURING COMPANY OF NEW JERSEY.

TUCK CREASER OR MARKER. FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 401,029, dated April 9,1889.

Application filed November 8, 1888. Serial No. 290,273. (Model) To allwhom it may concern.-

Be it known that I, JOHN M. GRIEST, a citi- New Jersey, have inventedcertain new and useful Improvements in Tuck Oreasers or Markers forSewing-Machines, of which the following is a specification, referencebeing had therein to the accompanying drawings.

In the operation of that class of tuck-creasers in which a notched orgrooved creasing roller or arm is caused to travel back and forth incontact with the work lying on an upturned creasing-lip more or lessdifficulty has been encountered when creasing across previouslymadetucks, plaits, or seams, owing to the fact that the goods are moved backand forth with the creasing roller or arm, and the proper feed of thework is thus interfered with.

The object of my invention is to obviate this difficulty by providing animproved tuckcreaser having a rigid creasing-arm which is yieldinglypressed against the work by a spring connecting the same with a rigidrocking bar operated from the needle-bar of the machine.

In the accompanying drawings, Figure l is a perspective view of myimproved tuckcreaser. Fig. 2 is a front view, Fig.3 is a plan view, andFig. 4 an end view, of the same. Fig. 5 is a vertical section on line 55, Fig. 2, and Fig. 6 a section on line 6 6, Fig. looking toward theleft in both instances.

A denotes a bracket by which the creaser is to be secured in operativeposition, and B is a supporting-bar passing loosely through saidbracket, but secured therein in any desired position of adjustment bythe clamping-nut a, as fully shown and described in my application No.259,096, filed December 27, 1887. The bar B has a return-bend or lowerpart, b, preferably flattened, as shown, and which is provided at itsforward end with an upturned creasing-lip, b.

C is a rocking bar extending lengthwise of the creaser parallel with thebar B and pivoted to the latter by means of the arms 0;

D is a rigid creasing arm or lever pivoted on the bar B and having anotched lower end registering with the creasing-lip b, said arm beingyieldingly connected with the rocking bar 0 by the spring-rod d, whichenters holes in the upper end of the lever D and in the rear arm, 0, ofthe said rocking bar, the latter being provided near its rear end with aforked lug, c, embracing the said rod.

E is the operating-lever pivoted on the bar B, and shown in the presentinstance as being provided with the hooked link 6, for connection withthe needle-bar of a sewing-machine, the said lever being notched at e toembrace the rocking bar 0 to operate the latter.

F is the strip-guide, having an arm, f, by which it is attached to thebracket A. The arm f passes loosely through said bracket, so that thesaid guide may be secured in said bracket in any desired position ofadjustment by the clamping-nut a, as described in my aforesaidapplication.

The operation of my creaser is as follows: \Vhen the needle-bar islifted and the feed is to occur, the creasing arm D is raised, as shownin full lines in Fig. 4, and when the needle-bar descends the said armmoves downward until it comes in contact with the work, when it stops,and as the needle-bar descends farther the said arm is yieldinglypressed upon the work lying on the creasing-lip, the rocking bar 0moving forward somewhat after the arm D has stopped, thus pressing thenotched lower end of the said arm firmly on the work, and thereby makinga well-defined crease therein, but without rubbing along on the same.When the needle-barrises, the arm or lever D remains in contact with thework until the bar C in its backward movement comes in contact with thelug d on the said arm or lever,when the latter is lifted from the work.Thus the operation continues, the creases being formed merely by thepressure of therigidbutyieldingly-pressed creasingarm or lever againstthe work lying on the creasing-lip.

I am aware that a rocking bar having a spring creasing-arm hasheretofore been employed in creasing devices; but I believe it to be newwith me to employ a rigid creasingarm yieldingly connected with a rigidrocking bar. In the prior devicesto which I have reference more or lesstrouble has been experienced owing to the displacement of the goods bythe spring creasing-arms, and I obviate this diflicnlty and secure moreuniformity and reliability of action than waspossible with the similardevices heretofore employed.

I claim 1. In a tuck creasing or marking attachment for sewing machines,the combination, with a rigid rocking bar extending lengthwise of theattachment and oscillating at right angles to its length and means forsupporting and operating said bar, of a rigid creasingarm, a springforming a yielding connection between said arm and rocking bar, and alower creasing lip or device co-operating with said creasing-arm.

2. In a tuck creaser or marker, the combination, with the supportingbarB, having a return-bend. provided at its forward end with acreasing-lip, of the rocking bar 0, pivoted on said bar B andoscillating at right angles to its length. the rigid arm or lever D, thespring -rod (1, connecting said rocking bar with the said arm or leverand the operatinglever E.

In testimony whereof I ajffix my signature in presence of two witnesses.

JOI'I N M. GRIES'I.

Vitnesses:

EWELL A. DICK, HENRY (JALVER.

